Translating device for railway signaling.



H. D, BATTERSON. TRANSLAHNG DBV APPLIUATIO Duented Dec. 15. 1914.

LLZLZSS.

y@ www Q ,.AELTLE? 3). PATTERSON, OF MOUNT VERNON, NEW' YORK.

UtSLTING '.DEVCE E028. RAILWAY SIGNALING.

Specification of Letters Patent.

Fatented Bec. 15, 1914.

application filed .Tune l. 1909. Serial No. 499,571.

i muy; concern n that 1, limoen .Pa'rrnnof the Unit-ed States, and a e citiY of lvlount YVernon, ter., State o1" New York, certain new and useful llmlaanslating Devices ior una', set l'orth in the iolion.

i. relates to sifvnaiing sysmore par z.npr-wed relaying apparatus i .cation with alternating cur- ,stems incliuling,r those "ited i'iarcli S, .nog current in am value, whereas, "eins, the sil; ialing curmaxnnum value. 'the applicant that ,r devices which are operetl the maximum value ol" :nich are inoi'icrativelv enirnum value of the curnt and design 'which increases ough theyY may operate satisge of the minimum u in the signaling curwill result a current varyi iaxinmrn which latter curlie employed :for relaying` purier object to do more than or the creation of a cura in a zero value to a maxiit being contemplated that the magnetic tint; varying from o maximum would also be eilicient in to ac"` n ishingg a 'useful purp se. ln fact the inicntion contemplates means for creating an;v eli'eci'ive energy manifestation whiff; from adinjiroxiniately zero response to variation in current from a minimum to llllli'll La creation oi a ect the invention con transforming an engreater K ercentage enis well a lapted for use cfrtain degree of delicacy in in connection with the Patterson cab signaling systems of the'alternating current type, disclosed in my applications and patentz- Se. No. 434,252, filed May 22, 1908; Se. No. 155,179, iiled Sep. QS, 1908; Patent No. 60 951540, `granted lliarch S, 1910.

The above and further objects of the invention will be clear from the followingr de scription and will be pointed out more in detail in the accompanying claims which 6 should be read in connection with the ac companying drawings, which form part of this application, in which like characters designate correspondingI parts, and in which the iq'ure is a diagram representing the cab 70 instalation in its relative relation to the track installation, the latter being shown in vertical section.

1 indicates a source of high constant frequency alternating potential carried on a 7C, moving vehicle which is customarily the cab or locomotive.

2 a suitable primary transformer core suitably suspended beneath the locomotive :nul having' a primary testing` winding` S0 l is a suitable laminated core of magnetic material haring windings 5 and 6 wound in opposite directions and which may be of the saine number of turns and wound interwoven or sandwiched according to approved transformer construction to prevent niagnetic leakage.

7 is a secondary winding of any suitable number of turns which may be in excess oi the number in either coil 5 or 6. 90

S indicates a suitable translating device, shown as an ordinary alternating current tractive relay.

9 is a solenoid operating the valve 10 for fluid pressure pipe 11. 95

12 indicates diagrammatically a suitable visible or audible signal: 13 is an adjustable impedance coil suitably proportioned as vvill hereinafter be explained.

1i is a source of electric energy.

The apparatus described is all `arried by the molving vehicle.

Circuits: The circuit for magnetizing primary ccil 3`of primary core Z may be traced as iolloWs:-source 1, wire 15, coil 0, Wire 105 16, coil 3; wire 17, wire 1S, back to source 1. The conditions of the current in this norinally closed circuit variesaccordng to the magnetic circuit of primary coil 3, which is variable. This circuit is also a variable 110 suliicient to note that nieans 38 for the circuit inagnetizing circuit for core l by means of coil 5. This circuit may he termed a signal controlling circuit,

The circuit for opposing coil 5 may he traced as follower--source l, wire l5, Wire 19, adjustable impedance 13, Wire 20, coil 5, wire 2l, Wire 18, back to source l. The condition of the current flowing in this circuit may he adjusted by the impedance 13 until the magneto-motive force of coil 5, which opposes thc'niagneto-motive.force of the coil 6 has the desired strength relatively to the magneto-motive force of the coil 6 when the minimum current is flowing in the signal circuit into which coil 6 is connected. Then the current through coil rof necessity must continue commensurate with the said mini mum current flowing in the signal circuit.

The circuit-for translating device 8 is. as folloWs :-coil 7, Wire 22, translating device 8, wire23, beck to coil 7. This circuit is normally energized, lout subject to total leenergizetion.

The relay circuit shown controlled b" translating device 8 may oe traced as fo lows :-source le; wire 24, circuit closing er- Inature 25, front Contact 26, (25 and26forn1- ing aV local circuit controller) to point 27, thence including solenoid 9 and indicating device l2 in parallel, to point 28, thence oy Wire 29 back to source 14;.

In the embodiment illustrated and described in this application, the traic con trolled signaling circuit combined With the present invention is controlled in the manner described in detail in my Patent No. 951,546. For the purposes of this specication it is a magnetizing current constantly flows from the alternating current generator l through the coil 3 to inegnetize the core 2, which normally has a large air gap between its poles. Positioned at the track 30, 3l, 33 are secondary cores 36 each having a Winding 37 and sonic controlling through the Winding' 37. The track core 36 is located so es to be interlinked hy the magnetic eld of the cab core 2 as a train advances along the track thereby to reduce the air 'gap in the magnetic circuit of the coil 3. lVhen the coil 37 on the' track-core 36 is open circuited, the core 36 greatly reduces the reluctance of the magnet-ic circuit for the coil 3, This causes a reduction in the magnetizing current flowing through the signal circuit and including coil G. lVhen the coil 37 on the track core is the equivalent of short circuited as by the controller 38, which should he understood to be under trailic control, a dissipation of electric energy in the form ci heat is caused. This energy must he sui plied by the current in the signal circuit through coil 6 and through coil 3, By this dissipation of energy the reduction in reino menace tance is oset and the current strength is maintained at the normal maximum. Thus it is evident that the current in the signal circuit through coils traiic control between a minimum velue. i

The magneto-motive forces oi' the coils 5 and 6 mounted on the same lcore e are opposed to each other.. The nuusgneto-ino` tive force ot' the coil 3. ismade tc. be substantially equal to the magneto-motive force of the coil 6 when the said minimum. current is flowing in vthe signalcircuit including the coil 6. The core e suhtractstlie magneto motive iorce of the coil froin the magneto motive force of the coil 6 sothat only the excess in magneto-motive force of coil over coil 5 is eiiective in inagnetizing the core e., 'lhe alternating magnetic field set up in core 4 cuts the secondary Winding 7 which transforms the alternating magnetic energy into alternatin electric energy. As a consequence althougi the current in the signal circuit 'Varies inerely from e. minimum value to a maximum value, the magnetic energy in the core l vvariesl from zero to e maximum and the electric energy in the coil .7 varies from zero to a maximum. Likewise the relay 8 is either netized. Thus the core fl may be termed power ineens oppositely acted upon by the magneto-motive force of the coil 5 and the magneto-motive force of the coil 6 to produce a variation of available energy of a greater percentage variation than the percentage of the currentwariation in the signaling circuit including coil 6.

The embodiment and application of the enia'ximuin value and invention as shown is, oi" course, 'merely for the purposes of illustration.

' To give a better idea of the eli'ect of a change in the percentage kof variation of the energy in u signal circuit the' following tables are useful:

Table Original vez-lation Changing subtractor Changed variation l0() to 90m- 10% lt is also appreciated `that vthis trausfon mation may he accomplished in a satisfac tory manner for seine purposes by using a maximum changing suhtractor instead of the minimum, which may he designated concretely as follower-F Table B.

Original variation i 100 to Changing suhtractor 1.00 to O0 'Changed variation It is alsoto be understood that the inven y 6 and 3 Varies widereli.

'sill magnetized or fle-mag'- lll) izo

lcom 10% i les(v ing an energy variation into a greater percentage variation, which may be designated concretely as follows Table C.

Original variation 100 to 9th-10%, Changing subtractor 85 to 85 Changed variation 15 to 5=66% Vhat is claimed and what is desired to 4be secured by United States Letters Pattent is l. In a signaling system, a source of electric energy; a circuit supplied by said source; traffic controlled means for creating a variation of electric energy in said circuit between a maximum value and a minimum value; and electro-magnetic means for changing said variation of energy in said circuit into an energy variation of greater percentage relatively to the maximum value of said last named energy, said means being electrically connected with said circuit.

Q. In a railway signaling system, a signal circuit; a source of electric ener for said circuit; traiiic controlled means or varying the current condition in said circuit between a maximum and a minimum electrical energy-value in accordance with tratlic conditions; and anl energy-variation transformi. ing device comprising a magnetizing coil included in said traic controlled circuit, a second magnetizing coil arranged to be energized by said source to have a magneto-motive force commensurate with the magnetomotive force of said iirst coil when the current condition in sa-id signal circuit is of said minimum value, and power-means oppositely acted upon by the magneto-motive forces of said magnetizing coils to produce a variation of available energy of greater percentage variation than that of the current-variation in said signal circuit.

3. In arailway signaling system, a signal circuit; a source of electric energy for said circuit; trailiccontrolled means :tor varying the current condition in said circuit between a maximum and a minimum electrical energy-value in accordance with traiiic conditions; an energy-\ai'iation transforming device comprising a magnetizing'hcoil included in said traiiic controlled circuit, a second magnetizing coil arranged to be energized by said source to have ay magneto-mon tive torce commensurate with the magnetomotive force ot' said iirst coil when the'current condition in said signal circuit is of said minimum value, and power-means oppositely acted upon by the magneto-motive forces oi said niagnetizing coils to produce G0 a variation of available energy of greater percentage variation than that of the current-variation in said signal circuit; and e local circuit controller actuated and operated by said power-means. n

4. In an alternating current signaling system, a source ot' alternating current and having provisions whereby the current flow in said circuit is normally 'present but has a variation between a maximum and a minimum value; an electro-magnetic signal device; a transforming device having three coils in interlinked magnetic relation, the first a primary coil included in said signal controlling circuit, the second a secondary coil. connected with said electro-magnetic signal device, the third a second primary coil; and means :tor energizing said second primary coil to give it a constant magnetizing etlect equal and opposite to that of said first primary coil when the current flowing in said signal controlling circuit has its minimum value.

5. In an alternating current signaling system, a signal controlling circuit vincluding a source of alternating current and having a traiiic controlled device for effecting a current variation in said circuit from a normal maximum value to a minimum value; an electro-magnetic signal device; a transforining device having three coils in interlinked magnetic relation, the iirst a primary coil included in said signal controlling circuit, the second a secondary coil connected with said electro-magnetic signal device, the third a second primary coil; and means for energizing said second primary coil to give it u. constant magnetizing effect equal and opposite to that ofsaid first primary coil when the current flowing in said signal controlling circuit has its minimum value.

6. In an alternating current 'cab signaling system; a source of constant high frequency alternating potential; a .primary testing coil tratliccontrolled means for varyinfr the reluctance of the magnetic ield of said testing coil; a core havin@ differential windings; a normally closed circuit including said source, said testing coil and one of said diiierential windings; and a second normally closed circuit including said source and a secondV of said ,differential windings.

In witness whereof, I have signed my name to this specification, in the presence of 115 two subscribing witnesses.

HAROLD D. PATTERSON. Witnesses z,

Cirnisrinn E. HANsnmmNN, LEONARD DAY.

a signal controlling circuit including i 

